/Engine/Source/Runtime/CoreUObject/Public/UObject/PackageResourceManager.h
Open anFArchiveto read the bytes of the package
AnFOpenPackageResult, with Result.Archive == archive for the bytes of the package or nullptr if it isn't found, and with other data describing the returned archive (seeFOpenPackageResult)
[FOpenPackageResult](API\Runtime\CoreUObject\UObject\FOpenPackageResult) OpenReadPackage ( const [FPackagePath](API\Runtime\CoreUObject\Misc\FPackagePath) & PackagePath, [FPackagePath](API\Runtime\CoreUObject\Misc\FPackagePath) * OutUpdatedPath )